All I can say is that one day you will look back and have a chuckle over all of it!
It's all good...you love Teddy and want what is best for him. He is going to be just fine and you are a good mom!
Get the fecal sample and take it in...I have a feeling all of the worms are probably dead. I hope so. And, even if not, he is due for one more treatment anyway!